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- W2080492329 abstract "Abstract The photoelectrochemical response of a number of perovskite oxide anodes, prepared by heating titanium or tungsten-coated discs with a paste of La 2 O 3 with each of the oxides, Cr 2 O 3 , RuO 2 , PtO 2 , Au 2 O 3 and Co 2 O 3 , have been studies. The titanium-supported photoanodes exhibited a higher photoactivity, for oxygen evolution, compared to the tungsten-supported electrodes. From the photoelectrochemical spectra of La 2 O 3 Cr 2 O 3 /Ti and La 2 O 3 RuO 2 /Ti, the band gaps were calculated to be 2.0 and 2.8 eV, respectively. A mixed spectral response was observed for the lanthanides of gold and cobalt. The absolute efficiency for the biased cells containing La 2 O 3 Cr 2 O 3 /Ti and La 2 O 3 RuO 2 /Ti as photoanodes was as high as 5% for the solar spectrum. High resolution X-ray photoelectron spectra for the atomic constituents of the La 2 O 3 Cr 2 O 3 /Ti photoanode, at various depths from the surface, were obtained. The most intense chromium peak was identified as arising from lanthanum chromite (LaCrO 3 ), while titanium in the +4 oxidation state was detected on the surface at low intensity. It was observed that the major product of the reaction between La 2 O 3 and Cr 2 O 3 was LaCrO 3 , the minor product being La 2 (CrO 4 ) 3 . The photoresponse of the La 2 O 3 Cr 2 O 3 /Ti electrode material was attributed to LaCrO 3 and/or La 2 (CrO 4 ) 3 , which have known d-d band splitting in the range 1.6–2.2 eV." @default.
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- W2080492329 date "1981-11-01" @default.
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- W2080492329 title "Photoelectrochemical behavior and surface characterization of some lanthanum-based perovskite oxide electrodes" @default.
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- W2080492329 doi "https://doi.org/10.1016/0165-1633(81)90049-6" @default.
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